change span only when SQL server table changed - ajax asp.net 3.5 jQuery SQL server

I have asp.net label called NumberLabel. It is changed from code-behind (asp.net/c#) by calculating the number of rows in an SQL server table called "MyTable".

Every time a user open this page, the same code/stored procedure is executed to bring the number.

Is there a way to to bring the same number for all users and change it only when there is an update in "MyTable"? This will optimize a lot time, executions, (SQL server side and webserver side). Does asynchronous C# exist? Or doing that by ajax?

Best Regards,开发者_C百科

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You can use application-level asp.net caching. See http://msdn.microsoft.com/en-us/library/ms178597.aspx